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Cheap flights from Idaho Falls to Illinois from $133

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Illinois departing on 2/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Idaho Falls to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:19 pm - 11:59 pm
IDA
-
ORD
6h 40m1 stop
United Airlines Logo
7:00 am - 1:30 pm
ORD
-
IDA
7h 30m1 stop
$331United Airlines
Mon, Jan 12 - Mon, Jan 19
Alaska Airlines Logo
6:58 pm - 1:10 pm
IDA
-
ORD
17h 12m2 stops
Alaska Airlines Logo
8:00 am - 6:18 pm
ORD
-
IDA
11h 18m1 stop
$342Alaska Airlines
Sat, Jan 24 - Tue, Jan 27
Alaska Airlines Logo
8:00 am - 4:33 pm
IDA
-
ORD
7h 33m1 stop
Alaska Airlines Logo
3:54 pm - 11:36 pm
ORD
-
IDA
8h 42m1 stop
$351Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
6:58 pm - 1:10 pm
IDA
-
ORD
17h 12m2 stops
Alaska Airlines Logo
2:06 pm - 10:59 pm
ORD
-
IDA
9h 53m2 stops
$353Alaska Airlines
Sat, Jan 24 - Tue, Jan 27
Alaska Airlines Logo
5:20 pm - 11:56 pm
IDA
-
ORD
29h 36m1 stop
Alaska Airlines Logo
3:54 pm - 11:36 pm
ORD
-
IDA
8h 42m1 stop
$357Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
American Airlines Logo
2:07 pm - 11:44 pm
IDA
-
ORD
8h 37m1 stop
American Airlines Logo
6:54 am - 1:37 pm
ORD
-
IDA
7h 43m1 stop
$378American Airlines
Mon, Jan 26 - Fri, Jan 30
Multiple Airlines Logo
9:20 pm - 2:17 pm
IDA
-
ORD
15h 57m2 stops
Multiple Airlines Logo
9:38 pm - 2:19 pm
ORD
-
IDA
17h 41m1 stop
$383Multiple Airlines
Fri, Feb 6 - Sun, Feb 8
Delta Logo
5:25 am - 4:16 pm
IDA
-
MDW
9h 51m2 stops
Delta Logo
1:49 pm - 10:57 pm
MDW
-
IDA
10h 08m2 stops
$515Delta
Sat, Jan 24 - Tue, Jan 27
American Airlines Logo
1:16 pm - 8:35 am
IDA
-
STL
18h 19m2 stops
American Airlines Logo
2:43 pm - 10:21 pm
STL
-
IDA
8h 38m1 stop
$788American Airlines
Wed, Dec 31 - Sun, Jan 4
Delta Logo
6:59 pm - 9:55 am
IDA
-
MDW
13h 56m2 stops
Delta Logo
10:35 am - 10:14 pm
MDW
-
IDA
12h 39m2 stops
$800Delta
Fri, Apr 10 - Sun, Apr 19

Alaska Airlines flights from Idaho Falls to Illinois

Our best Alaska Airlines deals on Idaho Falls to Illinois flight tickets
Alaska Airlines
Feb 14
IDA8:00 amIdaho Falls Fanning Field
7h 33m
1 stop
ORD4:33 pmChicago O'Hare Intl
Feb 18
ORD3:54 pmChicago O'Hare Intl
8h 42m
1 stop
IDA11:36 pmIdaho Falls Fanning Field
$351
Find similar
Alaska Airlines
Feb 14
IDA5:20 pmIdaho Falls Fanning Field
29h 36m
1 stop
ORD11:56 pmChicago O'Hare Intl
Feb 18
ORD3:54 pmChicago O'Hare Intl
8h 42m
1 stop
IDA11:36 pmIdaho Falls Fanning Field
$357
Find similar
Alaska Airlines
Jan 26
IDA6:58 pmIdaho Falls Fanning Field
18h 40m
1 stop
ORD2:38 pmChicago O'Hare Intl
Jan 30
ORD3:44 pmChicago O'Hare Intl
27h 34m
2 stops
IDA6:18 pmIdaho Falls Fanning Field
$372
Find similar

United Airlines flights from Idaho Falls to Illinois

Our best United Airlines deals on Idaho Falls to Illinois flight tickets
United Airlines
Jan 12
IDA4:19 pmIdaho Falls Fanning Field
6h 40m
1 stop
ORD11:59 pmChicago O'Hare Intl
Jan 19
ORD7:00 amChicago O'Hare Intl
7h 30m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
$331
Find similar
United Airlines
Apr 10
IDA5:30 pmIdaho Falls Fanning Field
5h 27m
1 stop
ORD11:57 pmChicago O'Hare Intl
Apr 19
ORD7:00 amChicago O'Hare Intl
7h 24m
1 stop
IDA1:24 pmIdaho Falls Fanning Field
$359
Find similar
United Airlines
Feb 14
IDA2:40 pmIdaho Falls Fanning Field
5h 34m
1 stop
MLI9:14 pmMoline Quad-City
Feb 18
MLI8:49 amMoline Quad-City
5h 41m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
$394
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 17, 2025.
Use the filters below to find and compare flights from Idaho Falls to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 1/12

4:19 pm-11:59 pm

1 stop6h 40m

Chicago O'Hare Intl

Mon 1/19

7:00 am-1:30 pm

1 stop7h 30m

$331

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 1/24

6:58 pm-1:10 pm

2 stops17h 12m

Chicago O'Hare Intl

Tue 1/27

8:00 am-6:18 pm

1 stop11h 18m

$342

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 2/14

8:00 am-4:33 pm

1 stop7h 33m

Chicago O'Hare Intl

Wed 2/18

3:54 pm-11:36 pm

1 stop8h 42m

$351

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 1/24

6:58 pm-1:10 pm

2 stops17h 12m

Chicago O'Hare Intl

Tue 1/27

2:06 pm-10:59 pm

2 stops9h 53m

$353

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 2/14

5:20 pm-11:56 pm

1 stop29h 36m

Chicago O'Hare Intl

Wed 2/18

3:54 pm-11:36 pm

1 stop8h 42m

$357

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 1/26

2:07 pm-11:44 pm

1 stop8h 37m

Chicago O'Hare Intl

Fri 1/30

6:54 am-1:37 pm

1 stop7h 43m

$378

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 2/6

9:20 pm-2:17 pm

2 stops15h 57m

Chicago O'Hare Intl

Sun 2/8

9:38 pm-2:19 pm

1 stop17h 41m

$383

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

Sat 1/24

5:25 am-4:16 pm

2 stops9h 51m

Chicago Midway

Tue 1/27

1:49 pm-10:57 pm

2 stops10h 08m

$515

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 12/31

1:16 pm-8:35 am

2 stops18h 19m

Lambert-St Louis

Sun 1/4

2:43 pm-10:21 pm

1 stop8h 38m

$788

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

Fri 4/10

6:59 pm-9:55 am

2 stops13h 56m

Chicago Midway

Sun 4/19

10:35 am-10:14 pm

2 stops12h 39m

$800

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Idaho Falls to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho Falls to Illinois is on a Tuesday when prices can be found for as low as $331. Flights from Idaho Falls to Illinois on a Sunday will generally be more expensive and average around $631. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Idaho Falls to Illinois during this time can be as low as $413. Flights in the afternoon are often more expensive with an average ticket price of $616.

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

Fly from Idaho Falls Fanning Field to Chicago O'Hare Intl for the best Idaho Falls Fanning Field - Illinois flight prices

What cabin class options are available on Idaho Falls Fanning Field to Illinois flights?

There are 2 cabin classes available to choose from on Idaho Falls Fanning Field to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Idaho Falls to Illinois flights?

You could potentially save up to 44% on your flight if you consider stops on a Idaho Falls to Illinois flight.

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Fastest flight time

5h 18m

Direct flights

Mon, Tue, Fri, Sat and Sun

Airports in Illinois

98 airports
The fastest flight from Idaho Falls to Illinois takes 5h 18m
Direct flights go from Idaho Falls to Illinois on Monday, Tuesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 98 airports in Illinois. From Idaho Falls there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?

    Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?

  • How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Idaho Falls to Illinois?

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $311Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
American AirlinesPriceFrom $323Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Illinois for you.

Can I find flights from Idaho Falls to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Idaho Falls to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Idaho Falls to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho Falls.

I’m not ready to book a flight from Idaho Falls to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Idaho Falls to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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